Boiler-indicator.



G. A. MORE.

BOILER INDICATOR.

APPUCATION FILED MAY 21. 1914.

PatentedSept. 26,1916.

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MM 77M $2 1 7 (a m a M Patented Sept. 26, 1916.

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G. A. MORE.

BOILER INDICATOR. APPLICATION F|LED MAY 27. IQMI LN m m: NuuR's onus cu.Pnomumo. vnsumnom n. c.

G. A. MORE. BOILER INDICATOR.

APPLICATION FILED MAY 27, 1914.

Patented Sept. 26, 1916.

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UNITED STATES PATENT OFFICE.

GEORGE ALAN MORE, OF NORTH SYDNEY,

NEW SOUTH WALES, AUSTRALIA.

BOILERJNDICATOR.

Specification of Letters Patent. Patented Sept 26 1916 Application filedMay 27, 1914. Serial No. 841,209.

, of Australia have invented new and useful Improvements inBoiler-Indicators, of which the following is a specification.

This invention relates to that class of apparatus employed for recordingvariations of level of water in steam boilers in which mechanismactuated by the changes of water levels in the boiler, records suchvariations automatically and continuously.

Heretofore the mechanical connection between the inclosed or wateroperated portion of the mechanism and the exteriorly placed mechanismhas consisted of a spindle passing through a stufling box and packing.This arrangement is objectionable in so far that friction of a varyingamount is periodically encountered by virtue of the wearing of thepacking and more especially when the gland is tightened up to obviateleakage. This periodical varying of the friction be tween the packingand the spindle militates against accurate records of varying waterlevels being obtained and may also lead, by excessive friction, to thesticking and thereby possible breaking by torsion of the packed spindle.

This invention consists in the employment of a spindle whereby thestuffing box with its packing is dispensed with, and whereby friction isreduced to a small but constant quantity.

Referring to the annexed sheets of explanatory drawings Figure 1 is aperspective view of the apparatus. Fig. 2 is a vertical section thereof.Fig. 3 is a horizontal section taken on line 3-3 Fig. 2. Fig. '4 is avertical section taken on line 44 Fig. 2.

Fig. 5 is a horizontal section taken on line 55 Fig. 4. Fig. 6 is asectional perspective view of the cam supporting shaft with itsextension, and Fig. 7 .is a view of the graduated card chart upon whichthe record of water levels is automatically recorded.

Corresponding numerals indicate corre sponding parts in the drawings.

10 is the water chamber to which water from the steam boiler whose waterlevels are to be indicated is admitted through the orifice 11. 7 r 12.is a float which is actuated by the'rising journaled in the mountingvalve 23 suificient freedom to settle itself and falling of thecontained water in cham- 7 her 10. p

13 is a steam orifice from which a connection is made between theapparatus and steam space of the boiler.

The float rod 14 is pivotally connected to the free end of the lever 15which latter is fulcrumed at 16.

The boss 17 of the lever 15is constructed as shown in section in Figs. 2and 4 in the form of a double cam the upper portion of which is of lessdiameter than the lower.

The lever axis or fulcrum 16 is trunnioned at one end (Fig. 4) in ascrewed steam tight plug 18 and at the other end a portion 19 istrunnioned in a hollow plug 20. The outer end 21 of the fulcrum isformed as a square and engages in horizontal sliding contact with arectangularly formed chamber constructed in the boss 22 of the steamvalve 23. A spiral spring 24 within the rectangular chamber forces thevalve 23lup to its face and obviates leakageof steam fromthe interior ofthe apparatus to the atmosphere. An extension spindle 25 is formed, inone, with the head of the valve 23, and is suitably 26 to permit theaccurately in its seating. To the outer end of this spindle is securedalever 27 at the free end of which is pivotally attached a connecting rod28 carrying at its outer end a recording pen or pencil 29 suitably heldin rubbing contact with a rotatingcard or chart 30 upon which when inoperation a line 31 is traced by'such pen or pencil 29.

Clockwork mechanism 32 rotates this card or chart '30 at a predeterminedspeed and the various markings and indexes thereon determine the precisetime at which variations from the datum circle 33 took place and theextent of such variations.

In lieu of the valve 23 a stuffing box or gland may be used in whichcase one end of the fulcrum 16 is extended outwardly to carry the lever27 and passes through the said stufling box or gland.

The mechanism for operating the steam 1 whistle alarm shown in Figs; 2and-4 00m- The upper portion of the vertical spindle 34 i piv tally fattached to the spider frame support 36. This frame 36 slides within thecasing 37 which is made adjustable in vertical plane by means of thescrewed thread by which it is secured to its seatin This verticaladjustment oi the casing 3'? permits of the range of high and low watermarks being increased or decreased within certain limits before thealarm whistle is sounded to announce either high or low water level.Thus by the raising of the casing 87 by partially uns 'rewing it in itsseating therange between high and low water marks is increased andalternatelyby screwing it downward the range is decreasedautomatically.- In Fig.4 the casing 37 isshown in its lowest verticalposition. The crosshead 38 of this support carries a conically shapedsteam valve 39 which takes its seating on the removable steam passage40. ll is a screwed gland which secures'the lower flange. of the steampip in place. Upon the lifting of the valve 39 from its seating 40 livesteam is permitted to flow from the interior of the apparatus throughthe pipe d2 to sound an alarm vwhistle.

Test of the ellicient working of the appa-. ratus is .carried out byalternately closing the water and steam services while keeping the draincock 46 open duringsuch proceedings. By this means any stoppage orpartial stoppage of flow in either the steam or water supply pipes isdiscovered. 45 is awater gage adapted to visually indi- 'cate the heightof water in the water chamber 10 of the apparatus.

In operation water and steam from the boiler to which the app aratus isattached are turned on; water from the boiler coming through the orifice11 into the water chamber 10 and steam through theorifice 13 into thesteam chamber. The water in the chamber 10 and steam in the steam spaceare under the same orapproximately the samepressure as {that existing inthe boiler, consequently the water leve'l in the chamber 10 moves inunison with the water level in the boiler. Upon the water level in theboiler being either raisedor lowered the float 12 is automaticallyraised or lowered by the :water level of the contained water within thechamber 10 moving in unison with the boiler water level. This actioncauses-the free end 43 of the lever 15 to be raised or loweredaccordinglybythe action of the float rod 12.

Theyopening of the steam whistle valve 39 is eiiected by means of theshoulders 44 of the cam '17 coming into contact with either one or otherof the tines or prongs'35 of the spindle 34 when the lever l5'is raisedor depressed; The valve39 isclosed when the lever 15 is in normalposition. The opening of the valve 39 permits a streamcf live steam toflow from the steam space of the apparatus to sound analarm to indicatea predetermined high and low water level.

The movement of the afloat actuated lever 15 in partially rotating itsaxis causes the extension spindle 25 to move the lever 27 datum circleto graphically record the extent of ,the range of varying water levelsin the boiler. otherwise driven at .a prcdetermlned speed the markingthereon graphically gives the" particulars of time at which thesevariations took place.

Whatil claim as my invention and desire tosecure by Letters Patent is.

[1. In an apparatus of the class described; the combination of 1asteam-tight casing affording a water column. fora boiler, the casingbeing provided with a bearing openi g presenting a valve seat at itsinner end, aspindle mounted within the casing and including two membersmounted to rotate in unison and having axially sliding contactwith-eachother, one member being incapable.

of axial movement within its bearings and the. other being capablev ofsuch movement and-extended through the said bearing opening inthecasing; aispherically shaped valve plug .of rigid material providedupon the latter anemberfor frictional contact 'with the scatratitheinner end of {said opening;

the said plug having independent radial movement, throughitsmcmberI-being in loose axial contact with the axially immovablemember, to provide a .normal seating to afford uniform friction and asteam tight joint at the bearing opening; indicating means-disposedexteriorly of ,the casing and associated operatively with the protrudingspindle member; and water-level actuated means provided within'thecasing for operating the other spindle member.

In an apparatus oi the class described, the combination of steam-tightcasingaffordinga wvater column fora boiler the casing being providedwith :a bearing opening presenting valve seat at its inner end .a.

spindle mounted within the casing and including two members mounted .torotatean unison and having axially sliding contact withieach other, onemember being incapable o'f ax'ial movement within its bearings and Asthe card chart is clockwork or the other being capable of such movementand extended through :thesaid bearing opening in the casing;aispherically shaped valve plug of rigid material provided upon thelatter memberfor itrictional contact with.

the seat at the inner end of said opening, the said plug [havingindependent radial movement, through its member being inloosc. axialcontact with the axially immovable lsof member to provide a normalseating to afford uniform friction and a steam tight joint at thebearing opening; indicating means disposed exteriorly of the casing andassociated operatively with the protruding spindle member, water levelactuated means provided within the casing for operating the otherspindle member, and resilient means for pressing the valve plug againstits seat until the steam is admitted to the casing from the boiler.

3. In an apparatus of the class described, the combination of asteam-tight casing affording a water column for a boiler, the casingbeing provided with a bearing opening presenting a valve seat at itsinner end, a spindle mounted within the casing and ineluding two membersmounted to rotate in unison and having axially sliding contact with eachother, one member being incapable of axial movement within its bearingsand the other being capable of such movement and extended through thesaid bearing opening in the casing, a spherically shaped valve plug ofrigid material'provided upon the latter member for frictional contactwith the seat at the inner end of said opening, the said plug havingindependent radial movement, through its member being in loose axialcontact with the axially immovable member, to provide a normal seatingto afford uniform friction and a steam-tight joint at the bearinopening; indicating means disposed exteriorly of the casing andassociated operatively with the protruding spindle member; water levelactuated means provided within the casing for operating the otherspindle member, and a compression spring associated with the spindle andtending to separate the members of the same to press the valve againstits seat, until the steam is admitted to the casing from the boiler.

a. In an apparatus of the class described, the combination of asteam-tight casing affording a water column for a boiler, the easingbeing provided with a bearing opening presenting a valve seat at itsinner end. a spindle mounted within the casing and ineluding two membersmounted to rotate in unison and having axially sliding contact with eachother, one member being incapable of axial movement within its bearingsand the other being capable of such movement and extended through thesaid bearing opening in the casing; spherically shaped valve plug ofrigid material provided upon the latter member for frictional contactwith the seat at the inner end of said opening, the said plug havingindependent radial move ment, through its member being in loose axialcontact with the axially immovable member, to provide a normal seatingto afford uniform friction and a stean1tight joint at the bearingopening; indicating ,fording means disposed exteriorly of the casing andassociated operatively with the protruding spindle member, and waterlevel actuated means provided within the casing for operating the otherspindle member, one of said spindle members being provided in its innerend with a non-circular recess and the other member being provided witha reduced non-circular extension upon its inner. end for axial slidingengagement within the recess of the first member.

5. In an apparatus of the class described, the combination of asteam-tight casing afa water column for a boiler, the casing beingprovided with a bearing opening presenting a valve seat at its innerend, a spindle mounted within the casing and including two membersmounted to rotate in unison and having axially sliding contact with eachother, one member being incapable of axial movement and the other beingcapable of such movement and extended through the saidbearing opening inthe casing; a spherically shaped valve plug of rigid material providedupon the latter member for frictional contact with the seat at the innerend of said opening, the said plug having independent radial movementthrough its member being in loose axial contact with the axiallyimmovable member, to provide a normal seating to afford uniform frictionand a steam-tight joint at the bearing opening; indicating meansdisposed exterior-1y of the casing and associated operatively with theprotruding spindle member; water level actuated means provided withinthe casing for operating the other spindle member, one of said spindlemembers being provided in its inner end with a non-circular recess andthe other member being provided with a reduced non-circular extensionupon its inner end for axial sliding engagement within the recess of thefirst member, and resilient means tending to separate the said spindlemembers to maintain the said valve plug seated until the steam isadmitted to the easing from the boiler.

6. In an apparatus of the class described, the combination of asteam-tight casing affording a water column for a boiler, the easingbeing provided with a bearing opening presenting a "alve seat at itsinner end, a spindle mounted within the casing and including two membersmounted to rotate in unison and having axially sliding contact with eachother, one member being incapable of axial movement within its bearingsand the other being capable of such move ment and extended through thesaid bearing opening in the casing; a spherically shaped valve plug ofrigid material ,pro-c vided upon the latter member for frictionalcontact with the seat at the inner end of said opening, the said plughaving inde- )endent radial movement throu h its meml is ber being inloose axial contact With the axially immovable member, to provide anormal seating to afford uniform friction and a steam-tight joint at thebearing opening; indicating means disposed exteriorly of the casing andassociated operatively with the protruding spindle member; Water levelaotuated means provided Within the casing for operating the otherspindle member, one of said spindle members being provided in its innerend with a non-circular recess and the other member being provided Witha reduced non-circular extension upon its inner end for axial slidingengagement Within the recess of the first member, and a compressionspring mounted Within the said recess in interposed relation to bothspindle members and tending normally to separate the members of the sameuntil the steam is admitted to the casing from the boiler.

In testimony whereof I have signed my name to this specification in thepresence v of two subscribing Witnesses.

GEORGE ALAN MORE.

Vitnesses G. G. HEIBURN, A. E. GooDWIN.

Copies of this patent may be obtained for five 'cents each, byaddressing the Commissioner of Patents,

' Washington, D. C.

